The article 'Husayn b. Ali' in the EI3 was contributed by Najam Haider. It deals mostly with the Ashura episode at the expense of leaving other aspects or episodes of his life and times. Some of the points highlighted in the entry are subject to question for their leaving an improper or unbalanced impression of Imam al-Husayn. It deals with some other doubtful historical claims, eg, his involvement in the conquests in the early Islamic period.
